<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {html_select_date} plugin
 *
 * Type:     function<br>
 * Name:     html_select_date<br>
 * Purpose:  Prints the dropdowns for date selection.
 *
 * ChangeLog:<br>
 * - 1.0 initial release
 * - 1.1 added support for +/- N syntax for begin
 * and end year values. (Monte)
 * - 1.2 added support for yyyy-mm-dd syntax for
 * time value. (Jan Rosier)
 * - 1.3 added support for choosing format for
 * month values (Gary Loescher)
 * - 1.3.1 added support for choosing format for
 * day values (Marcus Bointon)
 * - 1.3.2 support negative timestamps, force year
 * dropdown to include given date unless explicitly set (Monte)
 * - 1.3.4 fix behaviour of 0000-00-00 00:00:00 dates to match that
 * of 0000-00-00 dates (cybot, boots)
 *
 * @link http://smarty.php.net/manual/en/language.function.html.select.date.php {html_select_date}
 * (Smarty online manual)
 * @version 1.3.4
 * @author Andrei Zmievski
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param array $params parameters
 * @param object $template template object
 * @return string
 */
function smarty_function_html_select_date($params, $template) {
	require_once (SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');
	require_once (SMARTY_PLUGINS_DIR . 'shared.make_timestamp.php');
	require_once (SMARTY_PLUGINS_DIR . 'function.html_options.php');
	
	/* Default values. */
	$prefix = "Date_";
	$start_year = strftime ( "%Y" );
	$end_year = $start_year;
	$display_days = true;
	$display_months = true;
	$display_years = true;
	$month_format = "%B";
	/* Write months as numbers by default  GL */
	$month_value_format = "%m";
	$day_format = "%02d";
	/* Write day values using this format MB */
	$day_value_format = "%d";
	$year_as_text = false;
	/* Display years in reverse order? Ie. 2000,1999,.... */
	$reverse_years = false;
	/* Should the select boxes be part of an array when returned from PHP?
	 e.g. setting it to "birthday", would create "birthday[Day]",
	 "birthday[Month]" & "birthday[Year]". Can be combined with prefix */
	$field_array = null;
	/* <select size>'s of the different <select> tags.
	 If not set, uses default dropdown. */
	$day_size = null;
	$month_size = null;
	$year_size = null;
	/* Unparsed attributes common to *ALL* the <select>/<input> tags.
	 An example might be in the template: all_extra ='class ="foo"'. */
	$all_extra = null;
	/* Separate attributes for the tags. */
	$day_extra = null;
	$month_extra = null;
	$year_extra = null;
	/* Order in which to display the fields.
	 "D" -> day, "M" -> month, "Y" -> year. */
	$field_order = 'MDY';
	/* String printed between the different fields. */
	$field_separator = "\n";
	$time = time ();
	$all_empty = null;
	$day_empty = null;
	$month_empty = null;
	$year_empty = null;
	$extra_attrs = '';
	
	foreach ( $params as $_key => $_value ) {
		switch ($_key) {
			case 'prefix' :
			case 'time' :
			case 'start_year' :
			case 'end_year' :
			case 'month_format' :
			case 'day_format' :
			case 'day_value_format' :
			case 'field_array' :
			case 'day_size' :
			case 'month_size' :
			case 'year_size' :
			case 'all_extra' :
			case 'day_extra' :
			case 'month_extra' :
			case 'year_extra' :
			case 'field_order' :
			case 'field_separator' :
			case 'month_value_format' :
			case 'month_empty' :
			case 'day_empty' :
			case 'year_empty' :
				$$_key = ( string ) $_value;
				break;
			
			case 'all_empty' :
				$$_key = ( string ) $_value;
				$day_empty = $month_empty = $year_empty = $all_empty;
				break;
			
			case 'display_days' :
			case 'display_months' :
			case 'display_years' :
			case 'year_as_text' :
			case 'reverse_years' :
				$$_key = ( bool ) $_value;
				break;
			
			default :
				if (! is_array ( $_value )) {
					$extra_attrs .= ' ' . $_key . '="' . smarty_function_escape_special_chars ( $_value ) . '"';
				} else {
					trigger_error ( "html_select_date: extra attribute '$_key' cannot be an array", E_USER_NOTICE );
				}
				break;
		}
	}
	
	if (preg_match ( '!^-\d+$!', $time )) {
		// negative timestamp, use date()
		$time = date ( 'Y-m-d', $time );
	}
	// If $time is not in format yyyy-mm-dd
	if (preg_match ( '/^(\d{0,4}-\d{0,2}-\d{0,2})/', $time, $found )) {
		$time = $found [1];
	} else {
		// use smarty_make_timestamp to get an unix timestamp and
		// strftime to make yyyy-mm-dd
		$time = strftime ( '%Y-%m-%d', smarty_make_timestamp ( $time ) );
	}
	// Now split this in pieces, which later can be used to set the select
	$time = explode ( "-", $time );
	// make syntax "+N" or "-N" work with start_year and end_year
	if (preg_match ( '!^(\+|\-)\s*(\d+)$!', $end_year, $match )) {
		if ($match [1] == '+') {
			$end_year = strftime ( '%Y' ) + $match [2];
		} else {
			$end_year = strftime ( '%Y' ) - $match [2];
		}
	}
	if (preg_match ( '!^(\+|\-)\s*(\d+)$!', $start_year, $match )) {
		if ($match [1] == '+') {
			$start_year = strftime ( '%Y' ) + $match [2];
		} else {
			$start_year = strftime ( '%Y' ) - $match [2];
		}
	}
	if (strlen ( $time [0] ) > 0) {
		if ($start_year > $time [0] && ! isset ( $params ['start_year'] )) {
			// force start year to include given date if not explicitly set
			$start_year = $time [0];
		}
		if ($end_year < $time [0] && ! isset ( $params ['end_year'] )) {
			// force end year to include given date if not explicitly set
			$end_year = $time [0];
		}
	}
	
	$field_order = strtoupper ( $field_order );
	
	$html_result = $month_result = $day_result = $year_result = "";
	
	$field_separator_count = - 1;
	if ($display_months) {
		$field_separator_count ++;
		$month_names = array ();
		$month_values = array ();
		if (isset ( $month_empty )) {
			$month_names [''] = $month_empty;
			$month_values [''] = '';
		}
		for($i = 1; $i <= 12; $i ++) {
			$month_names [$i] = strftime ( $month_format, mktime ( 0, 0, 0, $i, 1, 2000 ) );
			$month_values [$i] = strftime ( $month_value_format, mktime ( 0, 0, 0, $i, 1, 2000 ) );
		}
		
		$month_result .= '<select name=';
		if (null !== $field_array) {
			$month_result .= '"' . $field_array . '[' . $prefix . 'Month]"';
		} else {
			$month_result .= '"' . $prefix . 'Month"';
		}
		if (null !== $month_size) {
			$month_result .= ' size="' . $month_size . '"';
		}
		if (null !== $month_extra) {
			$month_result .= ' ' . $month_extra;
		}
		if (null !== $all_extra) {
			$month_result .= ' ' . $all_extra;
		}
		$month_result .= $extra_attrs . '>' . "\n";
		
		$month_result .= smarty_function_html_options ( array ('output' => $month_names, 'values' => $month_values, 'selected' => ( int ) $time [1] ? strftime ( $month_value_format, mktime ( 0, 0, 0, ( int ) $time [1], 1, 2000 ) ) : '', 'print_result' => false ), $template );
		$month_result .= '</select>';
	}
	
	if ($display_days) {
		$field_separator_count ++;
		$days = array ();
		if (isset ( $day_empty )) {
			$days [''] = $day_empty;
			$day_values [''] = '';
		}
		for($i = 1; $i <= 31; $i ++) {
			$days [] = sprintf ( $day_format, $i );
			$day_values [] = sprintf ( $day_value_format, $i );
		}
		
		$day_result .= '<select name=';
		if (null !== $field_array) {
			$day_result .= '"' . $field_array . '[' . $prefix . 'Day]"';
		} else {
			$day_result .= '"' . $prefix . 'Day"';
		}
		if (null !== $day_size) {
			$day_result .= ' size="' . $day_size . '"';
		}
		if (null !== $all_extra) {
			$day_result .= ' ' . $all_extra;
		}
		if (null !== $day_extra) {
			$day_result .= ' ' . $day_extra;
		}
		$day_result .= $extra_attrs . '>' . "\n";
		$day_result .= smarty_function_html_options ( array ('output' => $days, 'values' => $day_values, 'selected' => $time [2], 'print_result' => false ), $template );
		$day_result .= '</select>';
	}
	
	if ($display_years) {
		$field_separator_count ++;
		if (null !== $field_array) {
			$year_name = $field_array . '[' . $prefix . 'Year]';
		} else {
			$year_name = $prefix . 'Year';
		}
		if ($year_as_text) {
			$year_result .= '<input type="text" name="' . $year_name . '" value="' . $time [0] . '" size="4" maxlength="4"';
			if (null !== $all_extra) {
				$year_result .= ' ' . $all_extra;
			}
			if (null !== $year_extra) {
				$year_result .= ' ' . $year_extra;
			}
			$year_result .= ' />';
		} else {
			$years = range ( ( int ) $start_year, ( int ) $end_year );
			if ($reverse_years) {
				rsort ( $years, SORT_NUMERIC );
			} else {
				sort ( $years, SORT_NUMERIC );
			}
			$yearvals = $years;
			if (isset ( $year_empty )) {
				array_unshift ( $years, $year_empty );
				array_unshift ( $yearvals, '' );
			}
			$year_result .= '<select name="' . $year_name . '"';
			if (null !== $year_size) {
				$year_result .= ' size="' . $year_size . '"';
			}
			if (null !== $all_extra) {
				$year_result .= ' ' . $all_extra;
			}
			if (null !== $year_extra) {
				$year_result .= ' ' . $year_extra;
			}
			$year_result .= $extra_attrs . '>' . "\n";
			$year_result .= smarty_function_html_options ( array ('output' => $years, 'values' => $yearvals, 'selected' => $time [0], 'print_result' => false ), $template );
			$year_result .= '</select>';
		}
	}
	// Loop thru the field_order field
	for($i = 0; $i <= 2; $i ++) {
		$c = substr ( $field_order, $i, 1 );
		switch ($c) {
			case 'D' :
				$html_result .= $day_result;
				break;
			
			case 'M' :
				$html_result .= $month_result;
				break;
			
			case 'Y' :
				$html_result .= $year_result;
				break;
		}
		// Add the field seperator
		if ($i < $field_separator_count) {
			$html_result .= $field_separator;
		}
	}
	
	return $html_result;
}

?>